x86 has ;; We use the Y prefix to denote any number of conditional register sets: ;; z First SSE register. ;; 2 SSE2 enabled ;; i SSE2 inter-unit moves enabled ;; m MMX inter-unit moves enabled Most of them are internal to gcc. But some instructions use the fixed XMM0 register. We may need the Yz constraint for asm statement. Shouldn't it be documented?
Subject: Bug 38402 Author: hjl Date: Fri Dec 12 14:32:00 2008 New Revision: 142710 URL: http://gcc.gnu.org/viewcvs?root=gcc&view=rev&rev=142710 Log: 2008-12-12 H.J. Lu <hongjiu.lu@intel.com> PR target/38402 * gcc/doc/md.texi: Remove Y and document Yz, Y2, Yi and Ym constraints for x86. Modified: trunk/gcc/ChangeLog trunk/gcc/doc/md.texi
Subject: Bug 38402 Author: hjl Date: Fri Dec 12 14:34:21 2008 New Revision: 142711 URL: http://gcc.gnu.org/viewcvs?root=gcc&view=rev&rev=142711 Log: 2008-12-12 H.J. Lu <hongjiu.lu@intel.com> Backport from mainline: 2008-12-12 H.J. Lu <hongjiu.lu@intel.com> PR target/38402 * gcc/doc/md.texi: Remove Y and document Yz, Y2, Yi and Ym constraints for x86. Modified: branches/gcc-4_3-branch/gcc/ChangeLog branches/gcc-4_3-branch/gcc/doc/md.texi
Fixed